Who doesn’t want free Wi-Fi access? If you could get it for free, why have to pay, right? We’ll it depends, accessing unsecured networks which is common in coffee shops, libraries, malls, bars and other public places could be fatal. Why? Crackers or wannabe hackers could install a Firefox plug-in named Firesheep that reveals those currently connected on the network and could retrieve information from cookies that contain data from your previous sessions from unencrypted websites such Facebook and Twitter.
Protect yourself by installing a Firefox Extension called HTTPS Everywhere.
And if you have your own Wi-Fi access point or a wireless router, don’t forget to put security access or password in it.